Tearful memorials were being held across tsunami-hit nations for the 220,000 people who perished when giant waves decimated coastal areas of the Indian Ocean a decade ago.
Japan braced Tuesday for one of its worst storms in years as typhoon Neoguri barrelled towards the southern Okinawa island chain, with the national weather agency issuing its highest alert and nearly half-a-million people urged to take shelter.
Residents in a remote section of the US Aleutian islands rushed to higher ground after an 7.9-magnitude earthquake off the coast of Alaska triggered a local tsunami warning, an official said.
A strong 6.0-magnitude earthquake shook buildings in Tokyo early Monday, lightly injuring 17 people, but officials stressed there was no risk of a tsunami.
A strong 6.6-magnitude earthquake struck off Papua New Guinea's Bougainville Island Saturday but there was no risk of a widespread tsunami, seismologists said.
Small tsunami waves hit northern Japan early Thursday following a powerful 8.2-magnitude earthquake thousands of kilometres away across the Pacific Ocean in Chile after officials issued an evacuation advisory for certain areas.
A powerful 8.2-magnitude earthquake hit Chile's Pacific coast Tuesday, triggering tsunami waves of more than two meters and warnings for people to flee to higher ground.
Japan on Tuesday marks the third anniversary of the quake-tsunami disaster which swept away 18,000 victims, destroyed coastal communities, and sparked a nuclear emergency that forced a re-think on atomic power.
A 6.1-magnitude earthquake struck off Indonesia's main island of Java on Saturday, the US Geological Survey reported, but local officials said there was no risk of a tsunami.
The Philippines launched an $8.17 billion plan on Wednesday to rebuild the lives of millions made homeless by Super Typhoon Haiyan and strengthen the disaster-prone nation's defences against future tempests.
Disaster experts warned Monday that mistakes made in the relief effort after the catastrophic 2004 Indian Ocean tsunami must not be repeated with the super typhoon that has smashed the Philippines.